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gerrit.nordix.org / codeaurora / cp-linux / 8d8f6542b666daf5e87de156590e635c2c4da0c0 / . / sound / aoa / codecs / toonie.c
blob: 7e8c3417cd853999246f3292dd16e395f6e70e6b [file] [log] [blame]
Kyle Swenson8d8f6542021-03-15 11:02:55 -0600[diff] [blame^]1/*
2 * Apple Onboard Audio driver for Toonie codec
3 *
4 * Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
5 *
6 * GPL v2, can be found in COPYING.
7 *
8 *
9 * This is a driver for the toonie codec chip. This chip is present
10 * on the Mac Mini and is nothing but a DAC.
11 */
12#include <linux/delay.h>
13#include <linux/module.h>
14#include <linux/slab.h>
15MODULE_AUTHOR("Johannes Berg <johannes@sipsolutions.net>");
16MODULE_LICENSE("GPL");
17MODULE_DESCRIPTION("toonie codec driver for snd-aoa");
18
19#include "../aoa.h"
20#include "../soundbus/soundbus.h"
21
22
23#define PFX "snd-aoa-codec-toonie: "
24
25struct toonie {
26 struct aoa_codec codec;
27};
28#define codec_to_toonie(c) container_of(c, struct toonie, codec)
29
30static int toonie_dev_register(struct snd_device *dev)
31{
32 return 0;
33}
34
35static struct snd_device_ops ops = {
36 .dev_register = toonie_dev_register,
37};
38
39static struct transfer_info toonie_transfers[] = {
40 /* This thing *only* has analog output,
41 * the rates are taken from Info.plist
42 * from Darwin. */
43 {
44 .formats = SNDRV_PCM_FMTBIT_S16_BE |
45 SNDRV_PCM_FMTBIT_S24_BE,
46 .rates = SNDRV_PCM_RATE_32000 |
47 SNDRV_PCM_RATE_44100 |
48 SNDRV_PCM_RATE_48000 |
49 SNDRV_PCM_RATE_88200 |
50 SNDRV_PCM_RATE_96000,
51 },
52 {}
53};
54
55static int toonie_usable(struct codec_info_item *cii,
56 struct transfer_info *ti,
57 struct transfer_info *out)
58{
59 return 1;
60}
61
62#ifdef CONFIG_PM
63static int toonie_suspend(struct codec_info_item *cii, pm_message_t state)
64{
65 /* can we turn it off somehow? */
66 return 0;
67}
68
69static int toonie_resume(struct codec_info_item *cii)
70{
71 return 0;
72}
73#endif /* CONFIG_PM */
74
75static struct codec_info toonie_codec_info = {
76 .transfers = toonie_transfers,
77 .sysclock_factor = 256,
78 .bus_factor = 64,
79 .owner = THIS_MODULE,
80 .usable = toonie_usable,
81#ifdef CONFIG_PM
82 .suspend = toonie_suspend,
83 .resume = toonie_resume,
84#endif
85};
86
87static int toonie_init_codec(struct aoa_codec *codec)
88{
89 struct toonie *toonie = codec_to_toonie(codec);
90
91 /* nothing connected? what a joke! */
92 if (toonie->codec.connected != 1)
93 return -ENOTCONN;
94
95 if (aoa_snd_device_new(SNDRV_DEV_CODEC, toonie, &ops)) {
96 printk(KERN_ERR PFX "failed to create toonie snd device!\n");
97 return -ENODEV;
98 }
99
100 if (toonie->codec.soundbus_dev->attach_codec(toonie->codec.soundbus_dev,
101 aoa_get_card(),
102 &toonie_codec_info, toonie)) {
103 printk(KERN_ERR PFX "error creating toonie pcm\n");
104 snd_device_free(aoa_get_card(), toonie);
105 return -ENODEV;
106 }
107
108 return 0;
109}
110
111static void toonie_exit_codec(struct aoa_codec *codec)
112{
113 struct toonie *toonie = codec_to_toonie(codec);
114
115 if (!toonie->codec.soundbus_dev) {
116 printk(KERN_ERR PFX "toonie_exit_codec called without soundbus_dev!\n");
117 return;
118 }
119 toonie->codec.soundbus_dev->detach_codec(toonie->codec.soundbus_dev, toonie);
120}
121
122static struct toonie *toonie;
123
124static int __init toonie_init(void)
125{
126 toonie = kzalloc(sizeof(struct toonie), GFP_KERNEL);
127
128 if (!toonie)
129 return -ENOMEM;
130
131 strlcpy(toonie->codec.name, "toonie", sizeof(toonie->codec.name));
132 toonie->codec.owner = THIS_MODULE;
133 toonie->codec.init = toonie_init_codec;
134 toonie->codec.exit = toonie_exit_codec;
135
136 if (aoa_codec_register(&toonie->codec)) {
137 kfree(toonie);
138 return -EINVAL;
139 }
140
141 return 0;
142}
143
144static void __exit toonie_exit(void)
145{
146 aoa_codec_unregister(&toonie->codec);
147 kfree(toonie);
148}
149
150module_init(toonie_init);
151module_exit(toonie_exit);